油砂沥青超声波减粘工艺研究

Study on ultrasonic visbreaking of oil sand bitumen

油砂沥青粘度较大,自然状态下不易流动,严重影响了管道输送及加工,针对目前油砂沥青研究中存在的问题,采用超声波进行了减粘的实验研究。实验综合考察了超声波作用时间、温度、超声波频率、超声波功率等因素对减粘效果的影响。实验结果表明,在适当的超声作用时间(20 min)、适宜的温度(30℃)、适宜的超声波频率(20 kHz)和超声波功率(250 W)的条件下,油砂沥青的减粘率可达80%以上。经超声波处理后的油砂沥青粘度略有恢复,但仍远低于处理前的粘度,超声波减粘效果良好。

Because viscosity of oil sand bitumen is big,and under the natural state is not easy to flow,so the serious influence pipeline transportation and the processing of oil sand bitumen.Aiming at the current issues which exist in the study of oil sand bitumen,ultrasonic visbreaking is used in the experiment.In the experiment,the effect of the ultrasonic treatment time,temperature,ultrasonic frequency,ultrasonic power has been studied,and the optimal conditions was confirmed.The optimum extraction parameters are：the ultrasonic treatment time is 20 min,operative temperature is 30 ℃,ultrasonic frequency is 20 kHz and ultrasonic power is 250 W.In such conditions the ultrasonic visbreaking rate of oil sand bitumen is above 80%.After ultrasonic treatment,the oil sand bitumen viscosity has a slight recovery,but still well below pre-treatment viscosity,so the ultrasonic visbreaking effect is good.